Bug 215658 - arch/powerpc/mm/mmu_context.o Assembler messages: Error: unrecognized opcode: `dssall' (PowerMac G4)

Bug 215658 - arch/powerpc/mm/mmu_context.o Assembler messages: Error: unrecognized opcode: `dssall' (PowerMac G4)

[Thorsten Leemhuis]

Hi, this is your Linux kernel regression tracker.

I noticed a regression report in bugzilla.kernel.org that afaics nobody
acted upon since it was reported about a week ago, that's why I decided
to forward it to the lists and a few relevant people to the CC. To quote
from the ticket:

> 5.16.12 kernel build for my G4 DP on my Talos II fails with:
> 
> [...]
>   CC      arch/powerpc/mm/init_32.o
>   CC      arch/powerpc/mm/pgtable_32.o
>   CC      arch/powerpc/mm/pgtable-frag.o
>   CC      arch/powerpc/mm/ioremap.o
>   CC      arch/powerpc/mm/ioremap_32.o
>   CC      arch/powerpc/mm/init-common.o
>   CC      arch/powerpc/mm/mmu_context.o
> {standard input}: Assembler messages:
> {standard input}:30: Error: unrecognized opcode: `dssall'
> make[2]: *** [scripts/Makefile.build:287: arch/powerpc/mm/mmu_context.o] Fehler 1
> make[1]: *** [scripts/Makefile.build:549: arch/powerpc/mm] Fehler 2
> make: *** [Makefile:1846: arch/powerpc] Error 2
> 
> This seems to have been introduced by commit d51f86cfd8e378d4907958db77da3074f6dce3ba "powerpc/mm: Switch obsolete dssall to .long"
> 
> Reverting this commit fixes the build for my G4.

Could somebody take a look into this? Or was this discussed somewhere
else already? Or even fixed?

Anyway, to get this tracked:

#regzbot introduced: d51f86cfd8e378d4907958db77da3074f6dce3ba
#regzbot from: Erhard F <erhard_f@mailbox.org>
#regzbot title:  arch/powerpc/mm/mmu_context.o Assembler messages:
Error: unrecognized opcode: `dssall' (PowerMac G4)
#regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=215658

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)

P.S.: As the Linux kernel's regression tracker I'm getting a lot of
reports on my table. I can only look briefly into most of them and lack
knowledge about most of the areas they concern. I thus unfortunately
will sometimes get things wrong or miss something important. I hope
that's not the case here; if you think it is, don't hesitate to tell me
in a public reply, it's in everyone's interest to set the public record
straight.

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Re: Bug 215658 - arch/powerpc/mm/mmu_context.o Assembler messages: Error: unrecognized opcode: `dssall' (PowerMac G4)

[Christophe Leroy]

Hi,

Le 10/03/2022 à 11:39, Thorsten Leemhuis a écrit :
> Hi, this is your Linux kernel regression tracker.
> 
> I noticed a regression report in bugzilla.kernel.org that afaics nobody
> acted upon since it was reported about a week ago, that's why I decided
> to forward it to the lists and a few relevant people to the CC. To quote
> from the ticket:

I already looked at it when the ticket was opened and that's a bit puzzling.

With v5.16.12 and the config file in the bug report I have no such problem:

   CC      arch/powerpc/mm/fault.o
   CC      arch/powerpc/mm/mem.o
   CC      arch/powerpc/mm/pgtable.o
   CC      arch/powerpc/mm/mmap.o
   CC      arch/powerpc/mm/maccess.o
   CC      arch/powerpc/mm/pageattr.o
   CC      arch/powerpc/mm/init_32.o
   CC      arch/powerpc/mm/pgtable_32.o
   CC      arch/powerpc/mm/pgtable-frag.o
   CC      arch/powerpc/mm/ioremap.o
   CC      arch/powerpc/mm/ioremap_32.o
   CC      arch/powerpc/mm/init-common.o
   CC      arch/powerpc/mm/drmem.o
   CC      arch/powerpc/mm/cacheflush.o
   CC      arch/powerpc/mm/book3s32/mmu.o
   CC      arch/powerpc/mm/book3s32/mmu_context.o
   AS      arch/powerpc/mm/book3s32/hash_low.o
   CC      arch/powerpc/mm/book3s32/tlb.o
   CC      arch/powerpc/mm/book3s32/kuep.o
   CC      arch/powerpc/mm/book3s32/kuap.o
   AR      arch/powerpc/mm/book3s32/built-in.a
   CC      arch/powerpc/mm/ptdump/ptdump.o
   CC      arch/powerpc/mm/ptdump/shared.o
   AR      arch/powerpc/mm/ptdump/built-in.a
   CC      arch/powerpc/mm/mmu_context.o
   AR      arch/powerpc/mm/built-in.a


The bug is puzzling because it says the problem is introduced by commit 
d51f86cfd8e3 ("powerpc/mm: Switch obsolete dssall to .long") whereas the 
purpose of that commit is exactly to fix the issue you are reporting.

And as far as I can see that commit is not in v5.16.12, so my feeling is 
that somethings wrong with the bug report.

By the way I think that cherry-picking that commit into v5.16.12 should 
fix it.

Christophe


> 
>> 5.16.12 kernel build for my G4 DP on my Talos II fails with:
>>
>> [...]
>>    CC      arch/powerpc/mm/init_32.o
>>    CC      arch/powerpc/mm/pgtable_32.o
>>    CC      arch/powerpc/mm/pgtable-frag.o
>>    CC      arch/powerpc/mm/ioremap.o
>>    CC      arch/powerpc/mm/ioremap_32.o
>>    CC      arch/powerpc/mm/init-common.o
>>    CC      arch/powerpc/mm/mmu_context.o
>> {standard input}: Assembler messages:
>> {standard input}:30: Error: unrecognized opcode: `dssall'
>> make[2]: *** [scripts/Makefile.build:287: arch/powerpc/mm/mmu_context.o] Fehler 1
>> make[1]: *** [scripts/Makefile.build:549: arch/powerpc/mm] Fehler 2
>> make: *** [Makefile:1846: arch/powerpc] Error 2
>>
>> This seems to have been introduced by commit d51f86cfd8e378d4907958db77da3074f6dce3ba "powerpc/mm: Switch obsolete dssall to .long"
>>
>> Reverting this commit fixes the build for my G4.
> 
> Could somebody take a look into this? Or was this discussed somewhere
> else already? Or even fixed?
> 
> Anyway, to get this tracked:
> 
> #regzbot introduced: d51f86cfd8e378d4907958db77da3074f6dce3ba
> #regzbot from: Erhard F <erhard_f@mailbox.org>
> #regzbot title:  arch/powerpc/mm/mmu_context.o Assembler messages:
> Error: unrecognized opcode: `dssall' (PowerMac G4)
> #regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=215658
> 
> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> 
> P.S.: As the Linux kernel's regression tracker I'm getting a lot of
> reports on my table. I can only look briefly into most of them and lack
> knowledge about most of the areas they concern. I thus unfortunately
> will sometimes get things wrong or miss something important. I hope
> that's not the case here; if you think it is, don't hesitate to tell me
> in a public reply, it's in everyone's interest to set the public record
> straight.
> 

Re: Bug 215658 - arch/powerpc/mm/mmu_context.o Assembler messages: Error: unrecognized opcode: `dssall' (PowerMac G4)

[Thorsten Leemhuis]

On 10.03.22 12:22, Christophe Leroy wrote:
> Le 10/03/2022 à 11:39, Thorsten Leemhuis a écrit :
>> Hi, this is your Linux kernel regression tracker.
>>
>> I noticed a regression report in bugzilla.kernel.org that afaics nobody
>> acted upon since it was reported about a week ago, that's why I decided
>> to forward it to the lists and a few relevant people to the CC. To quote
>> from the ticket:
> 
> I already looked at it when the ticket was opened and that's a bit puzzling.

Yeah, same here, but I decided I to pick it up, as that's what I'm here for.

> With v5.16.12 and the config file in the bug report I have no such problem:
> 
>    CC      arch/powerpc/mm/fault.o
>    CC      arch/powerpc/mm/mem.o
> [...]

Maybe it's one of those bugs related to the version of binutils?

> The bug is puzzling because it says the problem is introduced by commit 
> d51f86cfd8e3 ("powerpc/mm: Switch obsolete dssall to .long") whereas the 
> purpose of that commit is exactly to fix the issue you are reporting.
>
> And as far as I can see that commit is not in v5.16.12, so my feeling is 
> that somethings wrong with the bug report.
> 
> By the way I think that cherry-picking that commit into v5.16.12 should 
> fix it.

Maybe that's what he had meant to be writing? Maybe your comment in the
ticket will lead to some enlightenment.

Thx for looking into this.

Ciao, Thorsten

>>> 5.16.12 kernel build for my G4 DP on my Talos II fails with:
>>>
>>> [...]
>>>    CC      arch/powerpc/mm/init_32.o
>>>    CC      arch/powerpc/mm/pgtable_32.o
>>>    CC      arch/powerpc/mm/pgtable-frag.o
>>>    CC      arch/powerpc/mm/ioremap.o
>>>    CC      arch/powerpc/mm/ioremap_32.o
>>>    CC      arch/powerpc/mm/init-common.o
>>>    CC      arch/powerpc/mm/mmu_context.o
>>> {standard input}: Assembler messages:
>>> {standard input}:30: Error: unrecognized opcode: `dssall'
>>> make[2]: *** [scripts/Makefile.build:287: arch/powerpc/mm/mmu_context.o] Fehler 1
>>> make[1]: *** [scripts/Makefile.build:549: arch/powerpc/mm] Fehler 2
>>> make: *** [Makefile:1846: arch/powerpc] Error 2
>>>
>>> This seems to have been introduced by commit d51f86cfd8e378d4907958db77da3074f6dce3ba "powerpc/mm: Switch obsolete dssall to .long"
>>>
>>> Reverting this commit fixes the build for my G4.
>>
>> Could somebody take a look into this? Or was this discussed somewhere
>> else already? Or even fixed?
>>
>> Anyway, to get this tracked:
>>
>> #regzbot introduced: d51f86cfd8e378d4907958db77da3074f6dce3ba
>> #regzbot from: Erhard F <erhard_f@mailbox.org>
>> #regzbot title:  arch/powerpc/mm/mmu_context.o Assembler messages:
>> Error: unrecognized opcode: `dssall' (PowerMac G4)
>> #regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=215658
>>
>> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
>>
>> P.S.: As the Linux kernel's regression tracker I'm getting a lot of
>> reports on my table. I can only look briefly into most of them and lack
>> knowledge about most of the areas they concern. I thus unfortunately
>> will sometimes get things wrong or miss something important. I hope
>> that's not the case here; if you think it is, don't hesitate to tell me
>> in a public reply, it's in everyone's interest to set the public record
>> straight.

Re: Bug 215658 - arch/powerpc/mm/mmu_context.o Assembler messages: Error: unrecognized opcode: `dssall' (PowerMac G4)

[Thorsten Leemhuis]

On 10.03.22 13:22, Thorsten Leemhuis wrote:
> On 10.03.22 12:22, Christophe Leroy wrote:
>> Le 10/03/2022 à 11:39, Thorsten Leemhuis a écrit :
>>> Hi, this is your Linux kernel regression tracker.
>>>
>>> I noticed a regression report in bugzilla.kernel.org that afaics nobody
>>> acted upon since it was reported about a week ago, that's why I decided
>>> to forward it to the lists and a few relevant people to the CC. To quote
>>> from the ticket:
>> I already looked at it when the ticket was opened and that's a bit puzzling.
> Yeah, same here, but I decided I to pick it up, as that's what I'm here for.

TWIMC, the reported stated in bugzilla:

```
> This was Gentoo Sources v5.16.12 not upstream sources. But now I am
> not able to reproduce it which is even more strange... Also Gentoos'
> v5.16.13 builds ok.
> 
> What I did in the meantime was downgrading to binutils 2.37 (had 2.38
> before) and rebuilding the toolchain afterwards.
> 
> So this probably was never a bug but an issue with my setup. ;)
> Closing here```

Thus removing it from the regression tracking as well:

#regzbot invalid: reporter can't reproduce anymore and the report was  a
bit puzzling anyway

Ciao, Thorsten

>> With v5.16.12 and the config file in the bug report I have no such problem:
>>
>>    CC      arch/powerpc/mm/fault.o
>>    CC      arch/powerpc/mm/mem.o
>> [...]
> 
> Maybe it's one of those bugs related to the version of binutils?
> 
>> The bug is puzzling because it says the problem is introduced by commit 
>> d51f86cfd8e3 ("powerpc/mm: Switch obsolete dssall to .long") whereas the 
>> purpose of that commit is exactly to fix the issue you are reporting.
>>
>> And as far as I can see that commit is not in v5.16.12, so my feeling is 
>> that somethings wrong with the bug report.
>>
>> By the way I think that cherry-picking that commit into v5.16.12 should 
>> fix it.
> 
> Maybe that's what he had meant to be writing? Maybe your comment in the
> ticket will lead to some enlightenment.
> 
> Thx for looking into this.
> 
> Ciao, Thorsten
> 
>>>> 5.16.12 kernel build for my G4 DP on my Talos II fails with:
>>>>
>>>> [...]
>>>>    CC      arch/powerpc/mm/init_32.o
>>>>    CC      arch/powerpc/mm/pgtable_32.o
>>>>    CC      arch/powerpc/mm/pgtable-frag.o
>>>>    CC      arch/powerpc/mm/ioremap.o
>>>>    CC      arch/powerpc/mm/ioremap_32.o
>>>>    CC      arch/powerpc/mm/init-common.o
>>>>    CC      arch/powerpc/mm/mmu_context.o
>>>> {standard input}: Assembler messages:
>>>> {standard input}:30: Error: unrecognized opcode: `dssall'
>>>> make[2]: *** [scripts/Makefile.build:287: arch/powerpc/mm/mmu_context.o] Fehler 1
>>>> make[1]: *** [scripts/Makefile.build:549: arch/powerpc/mm] Fehler 2
>>>> make: *** [Makefile:1846: arch/powerpc] Error 2
>>>>
>>>> This seems to have been introduced by commit d51f86cfd8e378d4907958db77da3074f6dce3ba "powerpc/mm: Switch obsolete dssall to .long"
>>>>
>>>> Reverting this commit fixes the build for my G4.
>>>
>>> Could somebody take a look into this? Or was this discussed somewhere
>>> else already? Or even fixed?
>>>
>>> Anyway, to get this tracked:
>>>
>>> #regzbot introduced: d51f86cfd8e378d4907958db77da3074f6dce3ba
>>> #regzbot from: Erhard F <erhard_f@mailbox.org>
>>> #regzbot title:  arch/powerpc/mm/mmu_context.o Assembler messages:
>>> Error: unrecognized opcode: `dssall' (PowerMac G4)
>>> #regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=215658
>>>
>>> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
>>>
>>> P.S.: As the Linux kernel's regression tracker I'm getting a lot of
>>> reports on my table. I can only look briefly into most of them and lack
>>> knowledge about most of the areas they concern. I thus unfortunately
>>> will sometimes get things wrong or miss something important. I hope
>>> that's not the case here; if you think it is, don't hesitate to tell me
>>> in a public reply, it's in everyone's interest to set the public record
>>> straight.